User manual

GPIO EXPANDER KEYPAD
AND LCD DEMO BOARD
USER’S GUIDE
© 2006 Microchip Technology Inc. DS51636A-page iii
Table of Contents
Preface ........................................................................................................................... 1
Introduction............................................................................................................ 1
Document Layout .................................................................................................. 1
Conventions Used in this Guide ............................................................................ 2
Recommended Reading........................................................................................ 2
The Microchip Web Site ........................................................................................ 3
Customer Support ................................................................................................. 3
Document Revision History ................................................................................... 3
Chapter 1. Product Overview ....................................................................................... 5
1.1 Introduction ..................................................................................................... 5
1.2 What is the GPIO Expander Keypad and LCD Demo Board? ....................... 5
1.3 What The GPIO Expander Keypad and LCD Demo Board Kit Includes ........ 5
Chapter 2. Installation and Operation ......................................................................... 7
2.1 Introduction ..................................................................................................... 7
2.2 Features ......................................................................................................... 7
2.3 Getting Started ............................................................................................... 8
2.4 GPIO Expander Keypad and LCD Demo Board Description ......................... 9
2.5 Firmware Description ................................................................................... 10
Appendix A. Schematics and Board Layouts ........................................................... 15
A.1 Introduction .................................................................................................. 15
A.2 Board Schematic - Page 1 ......................................................................... 16
A.3 Board Schematic - Page 2 ......................................................................... 17
A.4 Board Schematic - Page 3 ......................................................................... 18
A.5 Board - Top Layer (with Silk screen) .......................................................... 19
A.6 Board - Bottom Layer ................................................................................. 19
Appendix B. Bill Of Materials (BOM) ......................................................................... 21
Worldwide Sales and Service .................................................................................... 24